热处理对大气等离子喷涂LaTi_(2)Al_(9)O_(19)-Zr_(0.92)Y_(0.08)O_(1.96)复合涂层粉末的影响  

Effect of Heat Treatment on LaTi_(2)Al_(9)O_(19)-Zr_(0.92)Y_(0.08)O_(1.96) Composite Coating Powders by Air Plasma Spraying

作　　者：杨泽生 宗鹏安 黄慕章 韩毅 周华建 冯英杰 张鹏 万春磊[1] Yang Zesheng;Zong Pengan;Huang Muzhang;Han Yi;Zhou Huajian;Feng Yingjie;Zhang Peng;Wan Chunlei(State Key Laboratory of New Ceramics and Fine Processing,Tsinghua University,Beijing 100084,China;College of Materials Science and Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084 [2]南京工业大学材料科学与工程学院,江苏南京211816

出　　处：《稀有金属材料与工程》2022年第5期1601-1605,共5页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(51590893,51902172);China Postdoctoral Science Foundation(2019M650670)。

摘　　要：将纳米/亚微米级Zr_(0.92)Y_(0.08)O_(1.96)(YSZ)增韧稀土复合氧化物LaTi_(2)Al_(9)O_(19)(LTA)颗粒通过喷雾干燥制备出喷涂粉体,采用不同温度对其进行煅烧,并研究不同温度的热处理对喷雾干燥粉体的流动性、松装密度和形貌的影响。结果表明:未经热处理的喷雾干燥粉体呈现出疏松结构,粒径为40~80μm。经过热处理后,LTA-YSZ颗粒之间的结合更加紧密,在1100℃下煅烧的粉体具有最好的喷雾特性和形貌。通过等离子喷涂进行沉积制备的LTA-YSZ涂层呈现良好的层状结构,并伴有缺陷。The nano/submicron scaled spraying powders of lanthanum titanium aluminum oxide LaTi_(2)Al_(9)O_(19)(LTA)toughened by yttria stabilized zirconia Zr_(0.92)Y_(0.08)O_(1.96)(YSZ)were prepared via spray drying and then calcined at different temperatures.The effect of heat treatment on the flowability,apparent density,and morphology of the spray-dried powders was investigated.Results show that the spray-dried powders have loose structure with the size of 40~80μm.The cohesion between LTA-YSZ particles becomes stronger after calcination.The spray-dried powders calcined at 1100℃ achieve the optimal spraying characteristics and morphology,and therefore are deposited via air plasma spraying(APS)to obtain LTA-YSZ coatings which show a good lamellar structure with defects.

关 键 词：喷雾干燥 溶胶凝胶法 流动性 松装密度 涂层 

分 类 号：TG174.4[金属学及工艺—金属表面处理]